= Important Information about Exchange Online (ExO) and Outlook (new) =

 * '''Outlook (classic)''', as the previous Outlook from the Office365 package is known, is intended to be replaced by '''Outlook (new)'''.
 * Microsoft has already introduced the Outlook (new) version as the default Outlook client on Windows 11 systems.
 * The new Outlook does not support connection to the on-prem Exchange 2016 mail server! Therefore, Outlook (new) should only be used if your  account has already been migrated to Exchange Online.
 * It is important to know that Outlook (new) is more similar to a web application than a classic desktop program. It is based on Progressive Web App (PWA) technology and essentially functions like a web version of Outlook running in a desktop frame.
 * Unlike the classic Outlook, the new version does not offer offline support.
 * There is no local storage of emails in the form of caches or OST files.

== S/MIME support under Windows in Outlook (new) is currently not available. ==
However, it should be possible to use it with a tool called [[https://support.microsoft.com/en-us/office/encrypt-messages-by-using-s-mime-in-outlook-on-the-web-878c79fc-7088-4b39-966f-14512658f480|S/MIME control]].

== IMPORTANT PRIVACY CONCERNS! ==
Please note that generally, all passwords entered in Outlook (new) are sent to Microsoft. This applies to all private email accounts such as gmx, gmail, etc. '''EXCEPTION''': the ETH email password! For the ETH email account, the password is replaced by a token that Microsoft receives. This token does not allow any conclusions to be drawn about the password.